Annual report pursuant to Section 13 and 15(d)

Note 8 - Financial Instruments and Risks - Outstanding Foreign Currency Forward Contracts (Details)

v3.8.0.1
Note 8 - Financial Instruments and Risks - Outstanding Foreign Currency Forward Contracts (Details) - 12 months ended Dec. 31, 2017
CAD in Thousands, $ in Thousands, MXN in Millions
USD ($)
CAD
MXN
Buy/Sell Buy    
Foreign Currency Amount | MXN     MXN 99
Notional Contract Value in USD $ 5,297    
Canada, Dollars      
Buy/Sell Buy    
Foreign Currency Amount | CAD   CAD 1,940  
Notional Contract Value in USD $ 1,509